1
18
19
4
12
13 14
5
15
6
7
16
Description
2
23
3
8
9
10
11
17
4
OTDR optic fiber connector
1
VFL optic fiber connector
2
LCD
3
20
Zoom control button
4
Full screen button
5
Menu button
6
Power button
7
21
Confirming button
8
22
Cancel button
9
Real-time measurement button
10
Average measurement button
11
Up button
12
Left button
13
Right button
14
Down button
15
File operation button
16
Cursor select button
17
Power adapter socket
18
Charge indicator
19
Anti-dust cover
20
USB interface
21
TF(micro SD) card slot
22
Support frame
23